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Re: Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
I'm ready to open up the app for community testing. If you want to try it out and help me refine the SfS logic "in the wild," you can join the beta starting today. How to get access: * Join the Google Group: https://groups.google.com/g/nack-beta-testers (Membership is required to see the Play Store listing). * Download… -
Re: Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
This project demonstrates a custom-built Shape-from-Shading (SfS) pipeline designed for mobile devices. The goal was to extract high-frequency surface details (micro-relief) from a single pair of flash/ambient photos with minimal inter-frame delay. Key Features: * Differential Reconstruction: Uses divergence-based Poisson… -
Re: Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
I totally feel you on Tandent LightBrush. It was legendary, but single-image decomposition is always a bit of a gamble because the math is fundamentally underdetermined.I'm taking a different path to avoid the 'bag of batteries' setup. My approach relies on multi-state lighting analysis. By capturing the delta between… -
Re: Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
IMO making scanned textures tiled is better to do manually in Zbrush or photoshop . Same for roughness. Based on Adobe Sampler its a waste of efforts. More lacking tools is de-lighting , especially extracting albedo from sun shadowed images . I yet have to see something working as good as those special flash lights that… -
Re: Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
Great questions! Tiled textures: Yes, seamless tiling is definitely on the roadmap. I'm currently working on an algorithm for automatic edge-blending to ensure textures can be used on large surfaces without visible seams.PBR elements (Roughness/Metalness): The app already extracts high-quality Geometry (Normals/Depth) and… -
Re: Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
Great observation! You're right that classic SfS thrives on uniform albedo and diffuse surfaces. However, Nack isn't strictly limited to small patches. * Scale: The 1x1m limit is mostly a 'flash power' constraint. For a 10-meter rocky mound, the Sun becomes the perfect directional light source. As long as there's a clear… -
Re: Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
My guess the method is working for tiny surface dents mostly , same color mostly, small 1x1m max patch , right? Not for 10 meters of rocky roadside mound texture with displacement ? Or it still could with sun light ? -
Re: Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
🚀 NACK — Mobile Real-World Capture Tool NACK is an offline mobile tool that transforms real-world surfaces and objects into digital data. Using only a smartphone, NACK allows you to capture textures, surface detail, depth information, and material properties — and instantly turn them into usable digital assets or analysis… -
Nack: Single-Flash 16-bit Surface Scanning. Is Photogrammetry overkill for micro-details?
Hi Polycount! I’ve spent the last year obsessed with a single problem: Why do we need to take 50+ photos and wait for cloud processing just to capture the surface of a brick or a piece of wood? I’m developing Nack — an Android tool that uses Shape-from-Shading (SfS) to reconstruct geometry from a single flash photo. No…
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